blob: 27b98a66e18b0bbf1355eb67e1f59f5fea875e6e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
entity inline_01 is
end entity inline_01;
----------------------------------------------------------------
architecture test of inline_01 is
function pulled_up ( drivers : bit_vector ) return bit is
begin
for index in drivers'range loop
if drivers(index) = '0' then
return '0';
end if;
end loop;
return '1';
end function pulled_up;
type state_type is (init_state, state1, state2, state3);
type state_vector is array (integer range <>) of state_type;
function resolve_state ( drivers : state_vector ) return state_type is
begin
return drivers(drivers'left);
end function resolve_state;
-- code from book:
signal interrupt_request : pulled_up bit bus;
signal stored_state : resolve_state state_type register := init_state;
-- end of code from book
begin
end architecture test;
|